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1. Naturally occurring amino acid residues in proteins are in which form? 2. The

ID: 812194 • Letter: 1

Question

1. Naturally occurring amino acid residues in proteins are in which form?

2. The Pka values of alpha carobxyl groups of common amino acids are around__________; the pKa values of the alpha amino groups of common amino acids are around___________.

3. Which amino acid takes on a negative charge when the R-group looses a proton? A) Glutamic Acid B) Histidine C) Glutaime D) Tyrosine E) Glutamic Acid & Tyrosine

4. Peptides and proteins have orientation and are always go from the ________ terminal to __________ terminal.

5. ___________ refers to the spatial arrangement of subunits and the nature of the their interactions

Explanation / Answer

1) alpha

2) 2 and 9

3) D ( not sure)

4) N to C

5)Isomerism